Commit | Line | Data |
9398955f |
1 | package SQL::Translator::Producer::MySQL; |
2 | |
49e1eb70 |
3 | # ------------------------------------------------------------------- |
866d012e |
4 | # $Id: MySQL.pm,v 1.54 2007-11-10 03:36:43 mwz444 Exp $ |
49e1eb70 |
5 | # ------------------------------------------------------------------- |
977651a5 |
6 | # Copyright (C) 2002-4 SQLFairy Authors |
9398955f |
7 | # |
8 | # This program is free software; you can redistribute it and/or |
9 | # modify it under the terms of the GNU General Public License as |
10 | # published by the Free Software Foundation; version 2. |
11 | # |
12 | # This program is distributed in the hope that it will be useful, but |
13 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | # General Public License for more details. |
16 | # |
17 | # You should have received a copy of the GNU General Public License |
18 | # along with this program; if not, write to the Free Software |
19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
20 | # 02111-1307 USA |
21 | # ------------------------------------------------------------------- |
22 | |
c855a748 |
23 | =head1 NAME |
24 | |
25 | SQL::Translator::Producer::MySQL - MySQL-specific producer for SQL::Translator |
26 | |
27 | =head1 SYNOPSIS |
28 | |
29 | Use via SQL::Translator: |
30 | |
31 | use SQL::Translator; |
32 | |
33 | my $t = SQL::Translator->new( parser => '...', producer => 'MySQL', '...' ); |
34 | $t->translate; |
35 | |
36 | =head1 DESCRIPTION |
37 | |
38 | This module will produce text output of the schema suitable for MySQL. |
39 | There are still some issues to be worked out with syntax differences |
40 | between MySQL versions 3 and 4 ("SET foreign_key_checks," character sets |
41 | for fields, etc.). |
42 | |
5a0c7b43 |
43 | =head2 Table Types |
44 | |
45 | Normally the tables will be created without any explicit table type given and |
46 | so will use the MySQL default. |
47 | |
48 | Any tables involved in foreign key constraints automatically get a table type |
49 | of InnoDB, unless this is overridden by setting the C<mysql_table_type> extra |
50 | attribute explicitly on the table. |
51 | |
52 | =head2 Extra attributes. |
53 | |
54 | The producer recognises the following extra attributes on the Schema objects. |
55 | |
56 | =over 4 |
57 | |
58 | =item field.list |
59 | |
60 | Set the list of allowed values for Enum fields. |
61 | |
fe0f47d0 |
62 | =item field.binary, field.unsigned, field.zerofill |
5a0c7b43 |
63 | |
64 | Set the MySQL field options of the same name. |
65 | |
4d438549 |
66 | =item field.renamed_from |
67 | |
68 | Used when producing diffs to say this column is the new name fo the specified |
69 | old column. |
70 | |
1ded8513 |
71 | =item table.mysql_table_type |
5a0c7b43 |
72 | |
73 | Set the type of the table e.g. 'InnoDB', 'MyISAM'. This will be |
74 | automatically set for tables involved in foreign key constraints if it is |
75 | not already set explicitly. See L<"Table Types">. |
76 | |
fe0f47d0 |
77 | =item table.mysql_charset, table.mysql_collate |
1ded8513 |
78 | |
79 | Set the tables default charater set and collation order. |
80 | |
fe0f47d0 |
81 | =item field.mysql_charset, field.mysql_collate |
1ded8513 |
82 | |
83 | Set the fields charater set and collation order. |
84 | |
5a0c7b43 |
85 | =back |
86 | |
c855a748 |
87 | =cut |
88 | |
9398955f |
89 | use strict; |
cd0ea0fd |
90 | use warnings; |
da5a1bae |
91 | use vars qw[ $VERSION $DEBUG %used_names ]; |
866d012e |
92 | $VERSION = sprintf "%d.%02d", q$Revision: 1.54 $ =~ /(\d+)\.(\d+)/; |
5636ed00 |
93 | $DEBUG = 0 unless defined $DEBUG; |
9398955f |
94 | |
95 | use Data::Dumper; |
1c14e9f1 |
96 | use SQL::Translator::Schema::Constants; |
5ee19df8 |
97 | use SQL::Translator::Utils qw(debug header_comment); |
9398955f |
98 | |
d2344c83 |
99 | # |
100 | # Use only lowercase for the keys (e.g. "long" and not "LONG") |
101 | # |
2620fc1c |
102 | my %translate = ( |
103 | # |
104 | # Oracle types |
105 | # |
106 | varchar2 => 'varchar', |
107 | long => 'text', |
d2344c83 |
108 | clob => 'longtext', |
2620fc1c |
109 | |
110 | # |
111 | # Sybase types |
112 | # |
113 | int => 'integer', |
114 | money => 'float', |
115 | real => 'double', |
116 | comment => 'text', |
117 | bit => 'tinyint', |
87779799 |
118 | |
119 | # |
120 | # Access types |
121 | # |
122 | 'long integer' => 'integer', |
123 | 'text' => 'text', |
124 | 'datetime' => 'datetime', |
2620fc1c |
125 | ); |
126 | |
9398955f |
127 | sub produce { |
a1d94525 |
128 | my $translator = shift; |
129 | local $DEBUG = $translator->debug; |
da5a1bae |
130 | local %used_names; |
a1d94525 |
131 | my $no_comments = $translator->no_comments; |
132 | my $add_drop_table = $translator->add_drop_table; |
133 | my $schema = $translator->schema; |
2bc23e82 |
134 | my $show_warnings = $translator->show_warnings || 0; |
d529894e |
135 | |
fe0f47d0 |
136 | my ($qt, $qf) = ('',''); |
137 | $qt = '`' if $translator->quote_table_names; |
138 | $qf = '`' if $translator->quote_field_names; |
139 | |
1a24938d |
140 | debug("PKG: Beginning production\n"); |
da5a1bae |
141 | %used_names = (); |
d529894e |
142 | my $create; |
5ee19df8 |
143 | $create .= header_comment unless ($no_comments); |
0823773d |
144 | # \todo Don't set if MySQL 3.x is set on command line |
da147d03 |
145 | $create .= "SET foreign_key_checks=0;\n\n"; |
9398955f |
146 | |
5a0c7b43 |
147 | # |
148 | # Work out which tables need to be InnoDB to support foreign key |
149 | # constraints. We do this first as we need InnoDB at both ends. |
150 | # |
151 | foreach ( map { $_->get_constraints } $schema->get_tables ) { |
cd0ea0fd |
152 | next unless $_->type eq FOREIGN_KEY; |
5a0c7b43 |
153 | foreach my $meth (qw/table reference_table/) { |
154 | my $table = $schema->get_table($_->$meth) || next; |
155 | next if $table->extra('mysql_table_type'); |
156 | $table->extra( 'mysql_table_type' => 'InnoDB'); |
157 | } |
158 | } |
159 | |
160 | # |
161 | # Generate sql |
162 | # |
cd0ea0fd |
163 | my @table_defs =(); |
4d438549 |
164 | |
1c14e9f1 |
165 | for my $table ( $schema->get_tables ) { |
cd0ea0fd |
166 | # print $table->name, "\n"; |
0013ee25 |
167 | push @table_defs, create_table($table, |
fe0f47d0 |
168 | { add_drop_table => $add_drop_table, |
169 | show_warnings => $show_warnings, |
170 | no_comments => $no_comments, |
171 | quote_table_names => $qt, |
172 | quote_field_names => $qf |
0013ee25 |
173 | }); |
174 | } |
9398955f |
175 | |
cd0ea0fd |
176 | # print "@table_defs\n"; |
fa94b25f |
177 | push @table_defs, "SET foreign_key_checks=1;\n\n"; |
cd0ea0fd |
178 | |
fa94b25f |
179 | return wantarray ? ($create, @table_defs) : $create . join ('', @table_defs); |
0013ee25 |
180 | } |
9398955f |
181 | |
0013ee25 |
182 | sub create_table |
183 | { |
184 | my ($table, $options) = @_; |
2620fc1c |
185 | |
fe0f47d0 |
186 | my $qt = $options->{quote_table_names} || ''; |
187 | my $qf = $options->{quote_field_names} || ''; |
188 | |
0013ee25 |
189 | my $table_name = $table->name; |
190 | debug("PKG: Looking at table '$table_name'\n"); |
6d3f6379 |
191 | |
0013ee25 |
192 | # |
193 | # Header. Should this look like what mysqldump produces? |
194 | # |
cd0ea0fd |
195 | my $create = ''; |
fa94b25f |
196 | my $drop; |
fe0f47d0 |
197 | $create .= "--\n-- Table: $qt$table_name$qt\n--\n" unless $options->{no_comments}; |
fa94b25f |
198 | $drop = qq[DROP TABLE IF EXISTS $qt$table_name$qt;\n] if $options->{add_drop_table}; |
fe0f47d0 |
199 | $create .= "CREATE TABLE $qt$table_name$qt (\n"; |
2b695517 |
200 | |
0013ee25 |
201 | # |
202 | # Fields |
203 | # |
204 | my @field_defs; |
205 | for my $field ( $table->get_fields ) { |
fe0f47d0 |
206 | push @field_defs, create_field($field, $options); |
0013ee25 |
207 | } |
1ded8513 |
208 | |
0013ee25 |
209 | # |
210 | # Indices |
211 | # |
212 | my @index_defs; |
213 | my %indexed_fields; |
214 | for my $index ( $table->get_indices ) { |
fe0f47d0 |
215 | push @index_defs, create_index($index, $options); |
0013ee25 |
216 | $indexed_fields{ $_ } = 1 for $index->fields; |
217 | } |
d529894e |
218 | |
0013ee25 |
219 | # |
220 | # Constraints -- need to handle more than just FK. -ky |
221 | # |
222 | my @constraint_defs; |
223 | my @constraints = $table->get_constraints; |
224 | for my $c ( @constraints ) { |
cd0ea0fd |
225 | my $constr = create_constraint($c, $options); |
226 | push @constraint_defs, $constr if($constr); |
0013ee25 |
227 | |
da5a1bae |
228 | unless ( $indexed_fields{ ($c->fields())[0] } || $c->type ne FOREIGN_KEY ) { |
229 | push @index_defs, "INDEX ($qf" . ($c->fields())[0] . "$qf)"; |
230 | $indexed_fields{ ($c->fields())[0] } = 1; |
231 | } |
0013ee25 |
232 | } |
1ded8513 |
233 | |
0013ee25 |
234 | $create .= join(",\n", map { " $_" } |
235 | @field_defs, @index_defs, @constraint_defs |
236 | ); |
9398955f |
237 | |
0013ee25 |
238 | # |
239 | # Footer |
240 | # |
241 | $create .= "\n)"; |
da5a1bae |
242 | $create .= generate_table_options($table) || ''; |
0013ee25 |
243 | $create .= ";\n\n"; |
9398955f |
244 | |
fa94b25f |
245 | return $drop ? ($drop,$create) : $create; |
0013ee25 |
246 | } |
f8b6e804 |
247 | |
da5a1bae |
248 | sub generate_table_options |
249 | { |
250 | my ($table) = @_; |
251 | my $create; |
252 | |
253 | my $table_type_defined = 0; |
254 | for my $t1_option_ref ( $table->options ) { |
255 | my($key, $value) = %{$t1_option_ref}; |
256 | $table_type_defined = 1 |
257 | if uc $key eq 'ENGINE' or uc $key eq 'TYPE'; |
258 | $create .= " $key=$value"; |
259 | } |
260 | my $mysql_table_type = $table->extra('mysql_table_type'); |
da5a1bae |
261 | $create .= " Type=$mysql_table_type" |
262 | if $mysql_table_type && !$table_type_defined; |
263 | my $charset = $table->extra('mysql_charset'); |
264 | my $collate = $table->extra('mysql_collate'); |
265 | my $comments = $table->comments; |
266 | |
267 | $create .= " DEFAULT CHARACTER SET $charset" if $charset; |
268 | $create .= " COLLATE $collate" if $collate; |
269 | $create .= qq[ comment='$comments'] if $comments; |
270 | return $create; |
271 | } |
272 | |
0013ee25 |
273 | sub create_field |
274 | { |
fe0f47d0 |
275 | my ($field, $options) = @_; |
276 | |
277 | my $qf = $options->{quote_field_names} ||= ''; |
9398955f |
278 | |
0013ee25 |
279 | my $field_name = $field->name; |
280 | debug("PKG: Looking at field '$field_name'\n"); |
fe0f47d0 |
281 | my $field_def = "$qf$field_name$qf"; |
0013ee25 |
282 | |
283 | # data type and size |
284 | my $data_type = $field->data_type; |
285 | my @size = $field->size; |
286 | my %extra = $field->extra; |
287 | my $list = $extra{'list'} || []; |
288 | # \todo deal with embedded quotes |
289 | my $commalist = join( ', ', map { qq['$_'] } @$list ); |
290 | my $charset = $extra{'mysql_charset'}; |
291 | my $collate = $extra{'mysql_collate'}; |
292 | |
293 | # |
294 | # Oracle "number" type -- figure best MySQL type |
295 | # |
296 | if ( lc $data_type eq 'number' ) { |
297 | # not an integer |
298 | if ( scalar @size > 1 ) { |
299 | $data_type = 'double'; |
d529894e |
300 | } |
0013ee25 |
301 | elsif ( $size[0] && $size[0] >= 12 ) { |
302 | $data_type = 'bigint'; |
303 | } |
304 | elsif ( $size[0] && $size[0] <= 1 ) { |
305 | $data_type = 'tinyint'; |
306 | } |
307 | else { |
308 | $data_type = 'int'; |
309 | } |
310 | } |
311 | # |
312 | # Convert a large Oracle varchar to "text" |
313 | # |
314 | elsif ( $data_type =~ /char/i && $size[0] > 255 ) { |
315 | $data_type = 'text'; |
316 | @size = (); |
317 | } |
318 | elsif ( $data_type =~ /char/i && ! $size[0] ) { |
319 | @size = (255); |
320 | } |
321 | elsif ( $data_type =~ /boolean/i ) { |
322 | $data_type = 'enum'; |
323 | $commalist = "'0','1'"; |
324 | } |
325 | elsif ( exists $translate{ lc $data_type } ) { |
326 | $data_type = $translate{ lc $data_type }; |
327 | } |
328 | |
329 | @size = () if $data_type =~ /(text|blob)/i; |
330 | |
331 | if ( $data_type =~ /(double|float)/ && scalar @size == 1 ) { |
332 | push @size, '0'; |
333 | } |
d529894e |
334 | |
0013ee25 |
335 | $field_def .= " $data_type"; |
336 | |
337 | if ( lc $data_type eq 'enum' ) { |
338 | $field_def .= '(' . $commalist . ')'; |
339 | } |
340 | elsif ( defined $size[0] && $size[0] > 0 ) { |
341 | $field_def .= '(' . join( ', ', @size ) . ')'; |
342 | } |
343 | |
344 | # char sets |
345 | $field_def .= " CHARACTER SET $charset" if $charset; |
346 | $field_def .= " COLLATE $collate" if $collate; |
347 | |
348 | # MySQL qualifiers |
349 | for my $qual ( qw[ binary unsigned zerofill ] ) { |
350 | my $val = $extra{ $qual } || $extra{ uc $qual } or next; |
351 | $field_def .= " $qual"; |
352 | } |
353 | for my $qual ( 'character set', 'collate', 'on update' ) { |
354 | my $val = $extra{ $qual } || $extra{ uc $qual } or next; |
355 | $field_def .= " $qual $val"; |
356 | } |
357 | |
358 | # Null? |
359 | $field_def .= ' NOT NULL' unless $field->is_nullable; |
360 | |
361 | # Default? XXX Need better quoting! |
362 | my $default = $field->default_value; |
363 | if ( defined $default ) { |
364 | if ( uc $default eq 'NULL') { |
365 | $field_def .= ' DEFAULT NULL'; |
366 | } else { |
367 | $field_def .= " DEFAULT '$default'"; |
368 | } |
369 | } |
370 | |
371 | if ( my $comments = $field->comments ) { |
372 | $field_def .= qq[ comment '$comments']; |
373 | } |
374 | |
375 | # auto_increment? |
376 | $field_def .= " auto_increment" if $field->is_auto_increment; |
377 | |
378 | return $field_def; |
379 | } |
380 | |
da5a1bae |
381 | sub alter_create_index |
382 | { |
383 | my ($index, $options) = @_; |
384 | |
385 | my $qt = $options->{quote_table_names} || ''; |
386 | my $qf = $options->{quote_field_names} || ''; |
387 | |
388 | return join( ' ', |
389 | 'ALTER TABLE', |
390 | $qt.$index->table->name.$qt, |
391 | 'ADD', |
392 | create_index(@_) |
393 | ); |
394 | } |
395 | |
0013ee25 |
396 | sub create_index |
397 | { |
fe0f47d0 |
398 | my ($index, $options) = @_; |
399 | |
400 | my $qf = $options->{quote_field_names} || ''; |
0013ee25 |
401 | |
402 | return join( ' ', |
da5a1bae |
403 | lc $index->type eq 'normal' ? 'INDEX' : $index->type . ' INDEX', |
0013ee25 |
404 | $index->name, |
fe0f47d0 |
405 | '(' . $qf . join( "$qf, $qf", $index->fields ) . $qf . ')' |
0013ee25 |
406 | ); |
407 | |
408 | } |
409 | |
da5a1bae |
410 | sub alter_drop_index |
411 | { |
412 | my ($index, $options) = @_; |
413 | |
414 | my $qt = $options->{quote_table_names} || ''; |
415 | my $qf = $options->{quote_field_names} || ''; |
416 | |
417 | return join( ' ', |
418 | 'ALTER TABLE', |
419 | $qt.$index->table->name.$qt, |
420 | 'DROP', |
421 | 'INDEX', |
422 | $index->name || $index->fields |
423 | ); |
424 | |
425 | } |
426 | |
427 | sub alter_drop_constraint |
428 | { |
429 | my ($c, $options) = @_; |
430 | |
431 | my $qt = $options->{quote_table_names} || ''; |
432 | my $qc = $options->{quote_constraint_names} || ''; |
433 | |
434 | my $out = sprintf('ALTER TABLE %s DROP %s %s', |
435 | $c->table->name, |
436 | $c->type, |
437 | $qc . $c->name . $qc ); |
438 | |
439 | return $out; |
440 | } |
441 | |
442 | sub alter_create_constraint |
443 | { |
444 | my ($index, $options) = @_; |
445 | |
446 | my $qt = $options->{quote_table_names} || ''; |
447 | return join( ' ', |
448 | 'ALTER TABLE', |
449 | $qt.$index->table->name.$qt, |
450 | 'ADD', |
451 | create_constraint(@_) ); |
452 | } |
453 | |
0013ee25 |
454 | sub create_constraint |
455 | { |
456 | my ($c, $options) = @_; |
457 | |
fb149f81 |
458 | my $qf = $options->{quote_field_names} || ''; |
459 | my $qt = $options->{quote_table_names} || ''; |
da5a1bae |
460 | my $leave_name = $options->{leave_name} || undef; |
fb149f81 |
461 | my $counter = ($options->{fk_name_counter} ||= {}); |
fe0f47d0 |
462 | |
0013ee25 |
463 | my @fields = $c->fields or next; |
464 | |
465 | if ( $c->type eq PRIMARY_KEY ) { |
fe0f47d0 |
466 | return 'PRIMARY KEY (' . $qf . join("$qf, $qf", @fields). $qf . ')'; |
0013ee25 |
467 | } |
468 | elsif ( $c->type eq UNIQUE ) { |
469 | return |
fe0f47d0 |
470 | 'UNIQUE '. |
471 | (defined $c->name ? $qf.$c->name.$qf.' ' : ''). |
472 | '(' . $qf . join("$qf, $qf", @fields). $qf . ')'; |
0013ee25 |
473 | } |
474 | elsif ( $c->type eq FOREIGN_KEY ) { |
d529894e |
475 | # |
0013ee25 |
476 | # Make sure FK field is indexed or MySQL complains. |
5e56da9a |
477 | # |
0013ee25 |
478 | |
866d012e |
479 | my $table = $c->table; |
da5a1bae |
480 | my $c_name = $c->name; |
866d012e |
481 | |
482 | # Give the constraint a name if it doesn't have one, so it doens't feel |
483 | # left out |
484 | unless ( $c_name ){ |
485 | $c_name = $table->name . '_fk'; |
486 | } |
487 | |
488 | $counter->{$table} ||= {}; |
0013ee25 |
489 | my $def = join(' ', |
fb149f81 |
490 | map { $_ || () } |
491 | 'CONSTRAINT', |
da5a1bae |
492 | $qt . join('_', next_unused_name($c_name) |
fb149f81 |
493 | ) . $qt, |
494 | 'FOREIGN KEY' |
495 | ); |
0013ee25 |
496 | |
da5a1bae |
497 | |
fe0f47d0 |
498 | $def .= ' ('.$qf . join( "$qf, $qf", @fields ) . $qf . ')'; |
0013ee25 |
499 | |
fe0f47d0 |
500 | $def .= ' REFERENCES ' . $qt . $c->reference_table . $qt; |
0013ee25 |
501 | |
502 | my @rfields = map { $_ || () } $c->reference_fields; |
503 | unless ( @rfields ) { |
504 | my $rtable_name = $c->reference_table; |
866d012e |
505 | if ( my $ref_table = $table->schema->get_table( $rtable_name ) ) { |
0013ee25 |
506 | push @rfields, $ref_table->primary_key; |
1c14e9f1 |
507 | } |
0013ee25 |
508 | else { |
509 | warn "Can't find reference table '$rtable_name' " . |
510 | "in schema\n" if $options->{show_warnings}; |
5e56da9a |
511 | } |
512 | } |
513 | |
0013ee25 |
514 | if ( @rfields ) { |
fe0f47d0 |
515 | $def .= ' (' . $qf . join( "$qf, $qf", @rfields ) . $qf . ')'; |
0013ee25 |
516 | } |
517 | else { |
866d012e |
518 | warn "FK constraint on " . $table->name . '.' . |
0013ee25 |
519 | join('', @fields) . " has no reference fields\n" |
520 | if $options->{show_warnings}; |
521 | } |
5e56da9a |
522 | |
0013ee25 |
523 | if ( $c->match_type ) { |
524 | $def .= ' MATCH ' . |
525 | ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL'; |
526 | } |
527 | |
528 | if ( $c->on_delete ) { |
529 | $def .= ' ON DELETE '.join( ' ', $c->on_delete ); |
530 | } |
531 | |
532 | if ( $c->on_update ) { |
533 | $def .= ' ON UPDATE '.join( ' ', $c->on_update ); |
534 | } |
cd0ea0fd |
535 | return $def; |
9398955f |
536 | } |
537 | |
cd0ea0fd |
538 | return undef; |
0013ee25 |
539 | } |
540 | |
da5a1bae |
541 | sub alter_table |
542 | { |
543 | my ($to_table, $options) = @_; |
544 | |
545 | my $qt = $options->{quote_table_name} || ''; |
546 | |
547 | my $table_options = generate_table_options($to_table) || ''; |
548 | my $out = sprintf('ALTER TABLE %s%s', |
549 | $qt . $to_table->name . $qt, |
550 | $table_options); |
551 | |
552 | return $out; |
553 | } |
554 | |
4d438549 |
555 | sub rename_field { alter_field(@_) } |
0013ee25 |
556 | sub alter_field |
557 | { |
fe0f47d0 |
558 | my ($from_field, $to_field, $options) = @_; |
559 | |
560 | my $qf = $options->{quote_field_name} || ''; |
561 | my $qt = $options->{quote_table_name} || ''; |
0013ee25 |
562 | |
563 | my $out = sprintf('ALTER TABLE %s CHANGE COLUMN %s %s', |
fe0f47d0 |
564 | $qt . $to_field->table->name . $qt, |
4d438549 |
565 | $qf . $from_field->name . $qf, |
fe0f47d0 |
566 | create_field($to_field, $options)); |
0013ee25 |
567 | |
568 | return $out; |
569 | } |
570 | |
571 | sub add_field |
572 | { |
fe0f47d0 |
573 | my ($new_field, $options) = @_; |
574 | |
575 | my $qt = $options->{quote_table_name} || ''; |
0013ee25 |
576 | |
577 | my $out = sprintf('ALTER TABLE %s ADD COLUMN %s', |
fe0f47d0 |
578 | $qt . $new_field->table->name . $qt, |
579 | create_field($new_field, $options)); |
0013ee25 |
580 | |
581 | return $out; |
582 | |
583 | } |
584 | |
585 | sub drop_field |
586 | { |
fe0f47d0 |
587 | my ($old_field, $options) = @_; |
0013ee25 |
588 | |
fe0f47d0 |
589 | my $qf = $options->{quote_field_name} || ''; |
590 | my $qt = $options->{quote_table_name} || ''; |
591 | |
0013ee25 |
592 | my $out = sprintf('ALTER TABLE %s DROP COLUMN %s', |
fe0f47d0 |
593 | $qt . $old_field->table->name . $qt, |
594 | $qf . $old_field->name . $qf); |
0013ee25 |
595 | |
596 | return $out; |
597 | |
9398955f |
598 | } |
599 | |
4d438549 |
600 | sub batch_alter_table { |
601 | my ($table, $diff_hash, $options) = @_; |
602 | |
603 | my @stmts = map { |
604 | if (@{ $diff_hash->{$_} || [] }) { |
605 | my $meth = __PACKAGE__->can($_) or die __PACKAGE__ . " cant $_"; |
606 | map { $meth->(ref $_ eq 'ARRAY' ? @$_ : $_) } @{ $diff_hash->{$_} } |
607 | } else { () } |
608 | } qw/alter_drop_constraint |
609 | alter_drop_index |
610 | drop_field |
611 | add_field |
612 | alter_field |
613 | rename_field |
614 | alter_create_index |
615 | alter_create_constraint |
616 | alter_table/; |
617 | |
618 | return unless @stmts; |
619 | # Just zero or one stmts. return now |
620 | return "@stmts;" unless @stmts > 1; |
621 | |
622 | # Now strip off the 'ALTER TABLE xyz' of all but the first one |
623 | |
624 | my $qt = $options->{quote_table_name} || ''; |
625 | my $table_name = $qt . $table->name . $qt; |
626 | |
627 | my $first = shift @stmts; |
628 | my ($alter_table) = $first =~ /^(ALTER TABLE \Q$table_name\E )/; |
629 | my $re = qr/^$alter_table/; |
630 | my $padd = " " x length($alter_table); |
631 | |
632 | return join( ",\n", $first, map { s/$re//; $padd . $_ } @stmts) . ';'; |
633 | } |
634 | |
635 | sub drop_table { |
636 | my ($table) = @_; |
637 | |
638 | # Drop (foreign key) constraints so table drops cleanly |
639 | $DB::single = 1; |
640 | my @sql = batch_alter_table($table, { alter_drop_constraint => [ grep { $_->type eq 'FOREIGN KEY' } $table->get_constraints ] }); |
641 | |
642 | return join("\n", @sql, "DROP TABLE $table;"); |
643 | |
644 | } |
645 | |
da5a1bae |
646 | sub next_unused_name { |
647 | my $name = shift || ''; |
648 | if ( !defined($used_names{$name}) ) { |
649 | $used_names{$name} = $name; |
650 | return $name; |
651 | } |
652 | |
653 | my $i = 1; |
654 | while ( defined($used_names{$name . '_' . $i}) ) { |
655 | ++$i; |
656 | } |
657 | $name .= '_' . $i; |
658 | $used_names{$name} = $name; |
659 | return $name; |
660 | } |
661 | |
9398955f |
662 | 1; |
9398955f |
663 | |
c855a748 |
664 | # ------------------------------------------------------------------- |
9398955f |
665 | |
c855a748 |
666 | =pod |
667 | |
668 | =head1 SEE ALSO |
669 | |
670 | SQL::Translator, http://www.mysql.com/. |
9398955f |
671 | |
2d6979da |
672 | =head1 AUTHORS |
9398955f |
673 | |
758ab1cd |
674 | darren chamberlain E<lt>darren@cpan.orgE<gt>, |
c855a748 |
675 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt>. |
676 | |
677 | =cut |